When referencing a character property, in expressions or even in text output, the character name is truncated to 10? characters and the property is expressed in the error message shows a 1 after the variable name. For example, in my vampire game:

bite %character% should modify and then output
%character%.BLOOD but the output shows:
TheMilkMai.BLOOD and the error message shows:
Bad Expression: TheMilkMai.BLOOD1-2